Artigos Técnicos e Apresentações

Aqui você encontrará apresentações realizadas nas Conferências de Usuários COMSOL de todo o mundo. As apresentações englobam pesquisas e produtos inovadores feitas por engenheiros e cientistas usando o COMSOL Multiphysics. Os tópicos abramgem uma grande gama de indústrias e aplicações, como elétrica, mecânica, escoamento e química. Use a função de busca "Quick Search" para encontrar apresentações na sua área de interesse.

Magnetic Fields and Materials for Medical Bone Reconstruction Assisted by Advanced Finite-Element Simulations

A. Sytcheva[1] and T. Herrmannsdörfer[1]
[1]Hochfeld-Magnetlabor Dresden, Forschungszentrum Dresden-Rossendorf, Dresden, Germany

We address the use of magnetic fields, forces, and materials for medical purposes. In particular, the treatment of osteochondral lesions is aimed for. To support ongoing activities in this field of research, last advances in using Finite Element Analysis (FEA) for the simulation of relevant processes, like magnetic targeting and magnetic fixation are reported. The availability of advanced ...

Gas Permeation Laboratory Experiment Simulation for Improved Learning

J. Lebowitz, and W.M. Clark
Worcester Polytechnic Institute

We are testing the hypothesis that the simulation of laboratory equipment will solidify the link between experiment and theory and provide improved learning for senior chemical engineering undergraduates. We developed a simulation of an industrially important gas permeation experiment in which air is separated into an oxygen-rich stream and an oxygen-depleted stream using a hollow fiber ...

Flow Analysis for a Sorghum Brewing Fermentation Process

T.A. Owosina
Simulo Technologies, Lagos, Nigeria

A qualitative flow analysis by numerical simulation of a fermentation process in a sorghum factory is presented. The simulations were done with the Numerical modeling software, COMSOL Multiphysics. Several flow arrangements were considered in the study and as a result, optimized flow configurations were evolved.

Modelling of the Hydrogen Diffusion in Martensitic Steel in Contact with H2SO4 Media

J. Bouhattate[1], X. Feaugas[1], and S. Frappart[1][2]
[1]Laboratoire d’Etudes des Matériaux en Milieux Agressifs,
Université de La Rochelle, La Rochelle, France
[2]V&M France, CEV, Aulnoye-Aymeries, France

Hydrogen Embrittlement (HE) is one of the mechanisms responsible for premature failure of structures. In the context of environmental sustainability, it is compelling to improve or conceive new processes and/or new materials capable of reducing fracture induced by HE. We analyzed the influence of the oxide layer on the permeability of hydrogen. This investigation was carried on as a correlative ...

Modeling Two-Phase Electrophoresis

W. Clark[1], and M. Lindblad[1]
[1]Chemical Engineering Department, Worcester Polytechnic Institute, Worcester, Massachusetts, USA

Two-phase electrophoresis is a separation method that combines aqueous two-phase partitioning with electrophoresis and has promise for large scale recovery of biological products. Aqueous two-phase systems formed by adding two polymers, like dextran and polyethylene glycol, to water provide some separation of dissolved species due to differences in solubility of solutes between the phases. COMSOL ...

Wall Effects in Convective Heat Transfer from a Sphere to Power Law Fluids in Tubes

D. Song[1], R. Gupta[1], and Chhabra[2]

[1]West Virginia University, Morgantown, West Virginia, USA
[2]Indian Institute of Technology, Kanpur, India

Heat transfer from a sphere having a uniform temperature and falling axially in a cylindrical tube filled with an incompressible power-law liquid is numerically investigated. The governing equations for simultaneous flow around a confined sphere and heat transfer to power-law fluids were solved numerically using COMSOL Multiphysics. It was found that the wall effects on the mean Nusselt number ...

COMSOL Implementation of Valet-Fert Model for CPP GMR devices

T. Xu[1], C.K.A. Mewes[1], S. Gupta[2], and W.H. Butler[1]
[1]Department of Physics and Astronomy and Center for Materials for Information Technology, University of Alabama, Tuscaloosa, Alabama, USA
[2]Department of Metallurgical and Materials Engineering and Center for Materials for Information Technology, University of Alabama, Tuscaloosa, Alabama, USA

The Giant Magneto Resistance (GMR) effect is a quantum mechanical effect which can be observed in systems consisting of thin alternating ferromagnetic and non-ferromagnetic layers. Simulation using COMSOL allows the evaluation of the magneto-resistance ratio and the electrical resistances of realistic CPP-GMR devices and opens the possibility to study new device materials and designs.

Simulation of Electromagnetic Stirrers and Brakes Applied in the Metallurgical Field

C. Mapelli
Politecnico di Milano

The control of the flux within continuous casting systems used in the metallurgical field can be obtained through the application of electromagnetic. The model here has been solved through a linear time-harmonic solver. The results of the electromagnetic model have then been applied to the fluid-mechanics model through volume Lorentz forces.

Quasi-static Analysis of Shielded Microstrip Lines

S.M. Musa, and M.N.O. Sadiku
Prairie View A&M University, Texas

Microstrip lines are the most commonly used transmission lines at high frequencies. In this paper, we will illustrate how to model the capacitance of microstrip lines using COMSOL Multiphysics. The goal is to determine the capacitance per unit length of shielded microstrip lines.

Synthesis of Force-Free Magnetic Fields as an Unconventional Inverse Problem

P.R. Kotiuga
Boston University

Here, the notion of a force-free magnetic field is conceptually useful in formulating inverse problems that articulate design objectives. In this paper, previous work pertaining to the topological structure of 3D force-free magnetic fields is reviewed, an inverse problem is formulated, and the role of the "dominant" eigenfield of the curl operator is considered. The problem of synthesizing ...

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